FN Archimer Export Format
PT J
TI Methanogenic activity and diversity in the centre of the Amsterdam Mud Volcano, Eastern Mediterranean Sea
BT 
AF LAZAR, Cassandre
   PARKES, R. John
   CRAGG, Barry A.
   L'HARIDON, Stephane
   TOFFIN, Laurent
AS 1:1;2:2;3:2;4:3;5:4;
FF 1:;2:;3:;4:;5:PDG-REM-EEP-LMEE;
C1 Univ N Carolina, Dept Marine Sci, Chapel Hill, NC 27515 USA.
   Cardiff Univ, Sch Earth & Ocean Sci, Cardiff, S Glam, Wales.
   Univ Bretagne Occidentale, Lab Microbiol Environm Extremes, UMR 6197, Plouzane, France.
   IFREMER,Ctr Brest,Dept Etud Environm Profonds, Plouzane, France.
C2 UNIV N CAROLINA, USA
   UNIV CARDIFF, UK
   UBO, FRANCE
   IFREMER, FRANCE
SI BREST
SE PDG-REM-EEP-LMEE
IN WOS Ifremer jusqu'en 2018
   copubli-france
   copubli-europe
   copubli-univ-france
   copubli-int-hors-europe
IF 3.56
TC 24
UR https://archimer.ifremer.fr/doc/00087/19795/17538.pdf
LA English
DT Article
CR MEDECO
BO Unknown
DE ;methanogenesis;mcrA;Archaea
AB Marine mud volcanoes are geological structures emitting large amounts of methane from their active centres. The Amsterdam mud volcano (AMV), located in the Anaximander Mountains south of Turkey, is characterized by intense active methane seepage produced in part by methanogens. To date, information about the diversity or the metabolic pathways used by the methanogens in active centres of marine mud volcanoes is limited. 14C-radiotracer measurements showed that methylamines/methanol, H2/CO2 and acetate were used for methanogenesis in the AMV. Methylotrophic methanogenesis was measured all along the sediment core, Methanosarcinales affiliated sequences were detected using archaeal 16S PCR-DGGE and mcrA gene libraries, and enrichments of methanogens showed the presence of Methanococcoides in the shallow sediment layers. Overall acetoclastic methanogenesis was higher than hydrogenotrophic methanogenesis, which is unusual for cold seep sediments. Interestingly, acetate porewater concentrations were extremely high in the AMV sediments. This might be the result of organic matter cracking in deeper hotter sediment layers. Methane was also produced from hexadecanes. For the most part, the methanogenic community diversity was in accordance with the depth distribution of the H2/CO2 and acetate methanogenesis. These results demonstrate the importance of methanogenic communities in the centres of marine mud volcanoes.
PY 2012
PD JUN
SO Fems Microbiology Ecology
SN 0168-6496
PU Wiley-blackwell
VL 81
IS 1
UT 000305183300022
BP 243
EP 254
DI 10.1111/j.1574-6941.2012.01375.x
ID 19795
ER

EF